diff --git a/vb/vb/packages.config b/vb/vb/packages.config
index 5026543..b9400c8 100644
--- a/vb/vb/packages.config
+++ b/vb/vb/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Antlr" version="3.5.0.2" targetFramework="net461" />
-  <package id="bootstrap" version="4.1.0" targetFramework="net461" />
+  <package id="bootstrap" version="4.3.1" targetFramework="net461" />
   <package id="jQuery" version="3.2.1" targetFramework="net461" />
   <package id="Microsoft.ApplicationInsights" version="2.4.0" targetFramework="net461" />
   <package id="Microsoft.ApplicationInsights.Agent.Intercept" version="2.4.0" targetFramework="net461" />